JP2013182752A - Electromagnetic operation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic operation device comprising a manual opening operation mechanism and an opening/closing prevention mechanism in safe, small-sized and simple structures.SOLUTION: An electromagnetic operation device comprises a flange which is fixed to a movable shaft, a lever which is engaged to the movable shaft, and a rotary shaft to which the lever is fixed and which is mounted rotatably. In an opening operation, the lever is rotated around the rotary shaft so as to be abutted to a surface of the flange at the side of a movable core.

Description

  The present invention relates to an electromagnetic operating device which is a driving device for a vacuum circuit breaker used in, for example, power equipment.

  A conventional vacuum circuit breaker has a vacuum valve with a movable contact and a stationary contact built in, and the movable contact is driven by an electromagnetic operating device through a contact pressure spring, a coupling mechanism, etc. The opening and closing operation of the child and the stationary contact is performed.

  In order to enable the tripping operation even when the control power supply or the operation power supply is lost, a manual tripping operation mechanism is provided, and the prior art manual tripping operation mechanism (Japanese Patent No. 3441360) is provided with a movable member. It has a lever to push down and a support member that supports the lever in a swingable manner, and the tip of the lever is driven forward and backward to combine with a support member of a movable member, and the lever is pushed down manually. In this method, the movable member is driven upward to be removed.

Japanese Patent No. 3441360

  In the electromagnetic operation device described in the above-mentioned conventional Patent Document 1, when performing a manual trip operation, after combining this lever with a movable member, the lever is driven downward about the support point of the support member. The movable member is driven upward, but if the resultant force of the wipe spring and the cutoff spring becomes larger than the attractive force of the permanent magnet, the movable member will self-run with the force of the wipe spring and the cutoff spring, and this lever will also be interlocked. Impact load may occur on the lever.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an electromagnetic operating device having a safe and inexpensive tripping mechanism.

  An electromagnetic operating device according to the present invention includes a movable iron core, a movable shaft fixed to the movable iron core in parallel with a movable direction of the movable iron core, a fixed iron core, and an open spring for urging the movable iron core in an opening direction. A magnetic circuit that forms a magnetic circuit with the movable iron core and the fixed iron core at the time of closing and generates a magnetic force that maintains a closed state against the spring, or a permanent magnet fixed to the fixed iron core, In this way, an opening coil that generates magnetic force in the movable iron core and the fixed iron core in a direction to reduce the magnetic force of the permanent magnet, and a magnetic force that urges the movable iron core in the closing direction by energization are generated. An electromagnetic operating mechanism comprising a closing coil that is fixed to the movable shaft, a rotating shaft that is rotatably supported by a fixed portion, and a lever that is fixed to the rotating shaft. Times By rotating operation around the axis, and has an abutment can be the lever to the plane of the closing direction side of the flange.

  Further, the electromagnetic operating device according to the present invention includes a movable iron core, a movable shaft fixed to the movable iron core in parallel with a movable direction of the movable iron core, a fixed iron core, and an opening that biases the movable iron core in the opening direction. And a permanent magnet fixed to the movable core or the fixed iron core, which forms a magnetic circuit with the movable iron core and the fixed iron core at the time of closing, and generates a magnetic force that holds the closed state against the spring. An opening coil that generates magnetic force in the movable iron core and the fixed iron core in a direction to reduce the magnetic force of the permanent magnet by energization, and a magnetic force that urges the movable iron core in a closing direction by energization. In the electromagnetic operating mechanism having a closing coil for generating a lock, a lock fixed to the movable shaft, and a lock play that can be moved to a position where the flange can be brought into contact with the surface on the closing direction side when closing. And it has a door.

Further, the electromagnetic operating device according to the present invention includes a movable iron core, a movable shaft fixed to the movable iron core in parallel with a movable direction of the movable iron core, a fixed iron core, and an opening that biases the movable iron core in the opening direction. And a permanent magnet fixed to the movable core or the fixed iron core, which forms a magnetic circuit with the movable iron core and the fixed iron core at the time of closing, and generates a magnetic force that holds the closed state against the spring. An opening coil that generates magnetic force in the movable iron core and the fixed iron core in a direction to reduce the magnetic force of the permanent magnet by energization, and a magnetic force that urges the movable iron core in a closing direction by energization. In the electromagnetic operating mechanism having a closed coil for generating a through screw hole, a through screw hole provided on the fixed portion in parallel with the movable direction, and at the closing time, the screw hole is screwed and attached to the screw hole. Is a moving part The opening direction of the surface and has a contact capable pins.

  Further, the electromagnetic operating device according to the present invention includes a movable iron core, a movable shaft fixed to the movable iron core in parallel with a movable direction of the movable iron core, a fixed iron core, and an opening that biases the movable iron core in the opening direction. And a permanent magnet fixed to the movable core or the fixed iron core, which forms a magnetic circuit with the movable iron core and the fixed iron core at the time of closing, and generates a magnetic force that holds the closed state against the spring. An opening coil that generates magnetic force in the movable iron core and the fixed iron core in a direction to reduce the magnetic force of the permanent magnet by energization, and a magnetic force that urges the movable iron core in a closing direction by energization. In the electromagnetic operating mechanism comprising a closed coil for generating a flange, the flange fixed to the movable shaft, the flange having a closed-side surface inclined, and in the closed state, Those having a contact capable of operating rod surface.

  Further, the electromagnetic operating device according to the present invention includes a movable iron core, a movable shaft fixed to the movable iron core in parallel with a movable direction of the movable iron core, a fixed iron core, and an opening that biases the movable iron core in the opening direction. And a permanent magnet fixed to the movable core or the fixed iron core, which forms a magnetic circuit with the movable iron core and the fixed iron core at the time of closing, and generates a magnetic force that holds the closed state against the spring. An opening coil that generates magnetic force in the movable iron core and the fixed iron core in a direction to reduce the magnetic force of the permanent magnet by energization, and a magnetic force that urges the movable iron core in a closing direction by energization. In an electromagnetic operating mechanism having a closed coil for generating an operating rod, an operating rod having a boss fixed to the movable shaft and an inclined portion, the inclined portion being able to contact the boss in a closed state Operation Those having a de.

  According to the electromagnetic operating device according to the present invention, a simple tripping mechanism comprising a flange and a lever that can come into contact with the flange is constructed, and the lever is lifted by operating the lever during the tripping operation. The lever and the flange are safely separated, and after the tripping operation, the return spring returns the lever to a position where it does not come into contact with the flange, so that the safety during operation of the tripping operation mechanism can be ensured.

  Further, according to the electromagnetic operation device according to the present invention, a simple closing prevention mechanism is configured by the flange and the lock plate that can come into contact with the flange, and the blocking prevention is set or released via the locking plate. Safety and safety can be secured.

  Further, according to the electromagnetic operating device according to the present invention, the tripping prevention pin is screwed into the through screw hole and brought into contact with the movable portion, thereby preventing the movable portion and the tripping prevention pin from rattling. The safety of operation of the trip prevention pin prevents the holding force of the magnetic force from decreasing due to the occurrence of GAP between the movable iron core and the fixed iron core during the detachment operation, and prevents the open spring load from being continuously applied to the trip prevention pin. Can be secured.

It is sectional drawing which shows the closing state in the electromagnetic operating device concerning Embodiment 1 of this invention. It is sectional drawing which shows the opening operation state immediately after the trip operation in the electromagnetic operating device concerning Embodiment 1 of this invention. It is sectional drawing which shows the opening state in the electromagnetic operating device concerning Embodiment 1 of this invention. It is sectional drawing which shows the state after an insertion prevention setting in the open state in the electromagnetic operating device concerning Embodiment 1 of this invention. It is a top sectional view showing the important section of the making prevention mechanism before making the making prevention set in the electromagnetic operating device concerning Embodiment 1 of this invention. It is a top sectional view showing the important section of the throwing prevention mechanism after the throwing prevention setting in the electromagnetic operating device according to Embodiment 1 of the present invention. It is sectional drawing which shows the state after the trip prevention setting in the closing state in the electromagnetic operating device concerning Embodiment 1 of this invention.

It is sectional drawing which shows the closing state in the electromagnetic operating device concerning Embodiment 2 of this invention. It is sectional drawing which shows the closing state in the electromagnetic operating device concerning Embodiment 3 of this invention. It is a perspective view which shows the part of the lever in the electromagnetic operating device concerning Embodiment 1 of this invention, and a rotating shaft. It is a perspective view which shows the operating rod in the electromagnetic operating device concerning Embodiment 2 of this invention. It is a perspective view which shows the operating rod in the electromagnetic operating device concerning Embodiment 3 of this invention.

Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 7. In each figure, the same or equivalent members and parts will be described with the same reference numerals. 1 is a cross-sectional view showing a closed state in an electromagnetic operating device according to Embodiment 1 of the present invention. FIG. 2 is a sectional view showing the opening operation state immediately after the tripping operation in the electromagnetic operating device according to Embodiment 1 of the present invention. FIG. 3 is a cross-sectional view showing an open state in the electromagnetic operating device according to Embodiment 1 of the present invention. FIG. 4 is a cross-sectional view showing a state after the setting for prevention of closing in the open state in the electromagnetic operating device according to Embodiment 1 of the present invention. FIG. 5 is a plan cross-sectional view showing the main part of the making prevention mechanism before making the making prevention setting in the electromagnetic operating device according to Embodiment 1 of the present invention. FIG. 6 is a plan sectional view showing the main part of the closing prevention mechanism after the closing prevention setting in the electromagnetic operating device according to Embodiment 1 of the present invention. FIG. 7 is a cross-sectional view showing a state after the trip prevention setting in the closed state in the electromagnetic operating device according to the first embodiment of the present invention.

  In FIG. 1, reference numeral 101 denotes a vacuum valve, in which a movable contact 102 and a fixed contact 103 are arranged, and the internal space of the vacuum valve 101 maintains a vacuum. The vacuum valve 101 is in a closed state, and the movable contact 102 and the fixed contact 103 are in contact with each other.

  The movable contact 102 and the fixed contact 103 are connected to the conductor 111 and the conductor 112, and the external terminal 113 and the external terminal 114, respectively, and the vacuum valve 101, the movable contact 102, the fixed contact 103, the conductor 111, and the conductor. 112, the external terminal 113 and the external terminal 114 constitute a main circuit of the vacuum circuit breaker.

  The movable contact 102 is connected to the movable shaft 131 of the electromagnetic operating device 130 via the insulating rod 120 and the contact pressure spring mechanism 121. The contact pressure spring mechanism 121 applies a load in the closing direction to the movable contact 102 and supplies a contact pressure between the movable contact 102 and the fixed contact 103.

The vacuum valve 101, the insulating rod 120, the conductor 111, and the conductor 112 are housed in a tank 110, a bushing 115, and a bushing 116 that are filled with an insulating medium such as SF ₆ gas or dry air.

  The movable part of the electromagnetic operating device 130 includes a movable shaft 131 and a movable iron core 133 fixed to the movable shaft 131. The fixed portion of the electromagnetic operating device 130 includes a frame 137, a fixed iron core 132 fixed to the frame 137, an open coil 135, a closed coil 136, and a permanent magnet 134 attached to the fixed iron core 132. Has been.

  A bearing frame 153 is attached to the upper part of the frame 137 of the electromagnetic operating device 130, and a spring seat 143 is attached to the bearing frame 153. Reference numeral 141 denotes an open spring, which is compressed and attached between a spring pressing plate 142 fixed to the movable shaft 131 and a spring seat 143, and supplies a load for lifting the movable shaft 131 upward.

  In the closed state, the opening spring 141 and the contact pressure spring mechanism 121 generate a force in the opening direction on the movable shaft 131, but the permanent magnet 134 forms a magnetic path in the movable iron core 133 and the fixed iron core 132. A magnetic force that maintains the closed state is generated.

  That is, the closed state is maintained by the magnetic force of the permanent magnet 134 against the generated force of the open spring 141 and the contact pressure spring mechanism 121. At the time of opening, when a current is passed through the opening coil 135, a magnetic field is generated in a direction that cancels the magnetic force of the permanent magnet 134. Therefore, the holding force in the closed state is reduced, and the opening spring 141 and the contact pressure spring mechanism The opening operation is performed by the force of 121.

  At the time of closing, when a current is passed through the closing coil 136, a magnetic force that attracts the movable iron core 133 in the closing direction is generated, and the opening spring 141 and the spring of the contact pressure spring mechanism 121 are stored, and the closing is performed. Operation is performed.

  The lever 151 has two plate portions 151 b, and the two plate portions 151 b are arranged to be engaged so as to sandwich the movable shaft 131. The lever 151 is fixed to the rotating shaft 152. The rotating shaft 152 is attached to the bearing frame 153 so as to be rotatable about its axis. FIG. 10 is a perspective view of the rotating shaft 152 and the lever 151 portion. A grip 158 is provided at the end of the rotating shaft 152. Reference numeral 155 denotes a stopper A, which is fixed to the bearing frame 153 at a position where it can contact the lever 151.

  Reference numeral 154 denotes a return spring A, which is attached between the lever 151 and the bearing frame 153 and biases the lever 151 in the counterclockwise direction. A screw is machined from the periphery of the flange 156 of the movable shaft 131 to the upper portion. The flange 156 is attached to the threaded portion of the movable shaft 131 and is prevented from rotating by a nut 157.

  Reference numeral 161 denotes a lock plate, which is guided so as to be slidable in the left-right direction on the frame 137 (the guide is not shown in FIG. 1). Reference numeral 162 denotes a return spring B that urges the lock plate 161 to the left, and the lock plate 161 abuts against the stopper B 163 and stops. 161 a is a contact plate fixed to the lock plate 161.

  Next, manual opening operation will be described. The vacuum valve 101 in FIG. 1 is in a closed state. When the gripping portion 158 of the rotary shaft 152 is rotated clockwise against the return spring A154 with a tool such as a wrench, the lever-151 comes into contact with the flange 156, and the movable shaft 131 and the movable iron core 133 together with the flange 156. Is pushed up.

  When the movable core 133 is lifted and a GAP of a few millimeters is generated at the portion where the lower end of the movable core 133 on the magnetic circuit composed of the movable core 133 and the fixed core 132 is in contact with the fixed core 132, the magnetic force is rapidly increased. To drop.

  When the spring force of the open spring 141 and the contact pressure spring mechanism 121 exceeds the holding force due to magnetic force, the movable shaft 131 starts to move in the opening direction by the spring force of the release spring 141 and the contact pressure spring mechanism 121. The flange 156 and the lever-151 are separated. In this way, the open state as shown in FIG. 2 is obtained.

  In addition, 151a of the lever-151 is a stopper portion that stops the rotation of the lever 151 at a rotation angle of the lever 151 in which the spring force of the release spring 141 and the contact pressure spring mechanism 121 is higher than the holding force by magnetic force. It is. As described above, the rotation angle of the lever 151 is suppressed by the stopper portion 151a, so that the return spring A154 is protected, thereby improving the reliability.

  FIG. 2 shows the opening operation state immediately after the tripping operation. When the manual operation force for rotating the lever-151 in the clockwise direction is eliminated, the lever-151 is rotated counterclockwise by the return spring A154 as shown in FIG. It stops in contact with the stopper A155 by rotating in the direction. In this posture of the lever-151, even if the flange 156 is lowered in a closed state as shown in FIG. 1, the lever-151 and the flange 156 are in a positional relationship in which they cannot contact each other.

  As described above, the manual tripping mechanism 150 having a simple structure including the flange 156 and the lever 151 that can come into contact with the flange 156 can be obtained.

  Further, after the lever-151 is operated during the manual pulling operation, when the movable member including the flange 156 is caused to self-run by the open spring force against the holding force due to the magnetic force, the flange 156 causes an impact on the lever 151 or the like. Can be safely separated from the lever 151 without applying a force.

  In addition, safety can be ensured by automatically returning the lever 151 to a position where it does not come into contact with the flange 156 by the return spring A154 after the pulling operation. In addition, by providing the stopper portion 151a that suppresses the rotation angle of the lever 151 in the pulling direction to the minimum necessary, the return spring A154 can be protected and the reliability of the lever 151 for automatic return can be enhanced.

  Next, the prevention of charging will be described. 3 is an open state before the setting for preventing charging, FIG. 4 is an opened state after setting for preventing charging, and FIGS. 5 and 6 are cross-sectional plan views showing the main parts of the preventing mechanism. In FIG. 5, the lock plate 161 is guided by the bearing frame 153 and can be translated in the left-right direction in the figure. A contact plate 161 a having a slope is fixed to the lock plate 161.

  Further, the lock plate 161 is urged to the left in the figure by the return spring B162, and is in contact with the stopper B163 and stopped. Reference numeral 164 denotes an insertion prevention pin, which is inserted into a hole 153a provided in the bearing frame 153 in the direction of the arrow shown in the figure, and is guided by the hole 153a. The plate 161 moves to the right in the figure against the return spring B162. FIG. 6 shows a state in which the tip of the insertion preventing pin 164 is attached to the locking hole 153b provided in the bearing frame 153, and the lock plate is opposed to the return spring B162 by the insertion preventing pin 164. 161 is held.

  At this time, the positional relationship between the lock plate 161 and the flange 156 is as shown in FIG. 4, and even if a throwing malfunction occurs, the flange 156 abuts against the tip of the lock plate 161 and the operation is blocked. To release the insertion prevention state, when the insertion prevention pin 164 is pulled out of the locking holes 153b and 153a of the bearing frame 153, the lock plate 161 is moved leftward in the drawing until the lock plate 161 comes into contact with the stopper B163 by the force of the return spring B162. As shown in FIG. 3, the lock plate 161 and the flange 156 are brought into a positional relationship where they cannot contact each other, and the closing operation is possible.

  As described above, the small-sized structure including the lock plate 161, the loading prevention pin 164, and the like is provided, and the loading prevention mechanism 160 applicable to a limited space is provided. Since insertion prevention or release is performed via the member, operability and safety can be ensured.

  In the first embodiment, the insertion preventing pin 160 and the locking plate 161 are provided. However, the same applies to a mechanism that prevents the insertion preventing pin 164 from directly contacting the flange 156. Can be prevented.

  Next, prevention of tripping will be described. FIG. 7 is a cross-sectional view showing the state after the trip prevention setting in the closed state. The trip prevention pin 170 is attached to the screw hole 137a formed in the frame 137, and the tip of the trip prevention pin 170 is connected to the movable iron core 133. It is pressed against.

  In this way, by pushing the tripping prevention pin 170 into the insertion direction while being screwed into the movable iron core 133, rattling between the tip of the tripping prevention pin 170 and the movable iron core 133 can be eliminated. Operation can be completely prevented.

  If the backlash prevention pin 170 has a backlash between the movable iron core 133 and the movable iron core 133, the holding force of the magnetic force is reduced due to the occurrence of GAP between the movable iron core 133 and the fixed iron core 132 during the erroneous pulling operation. An open spring load may be continuously applied to the trip prevention pin 170.

  In this way, by adopting a structure in which the tip of the trip prevention pin 170 is screwed and pressed into the movable iron core 133, safety when the trip prevention pin 170 is attached / detached can be ensured.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIG. FIG. 8 is a cross-sectional view showing a closed state in an electromagnetic operating device according to Embodiment 2 of the present invention.

  Hereinafter, an embodiment for carrying out the present invention will be described with reference to the drawings. A screw is machined from the periphery of the flange 181 of the movable shaft 131 to the upper portion. The flange 181 is attached to the threaded portion of the movable shaft 131 and is prevented from rotating by a nut 157. The surface of the flange 181 on the frame 137 side is an inclined surface 181a. Reference numeral 182 denotes an operating rod which can slide to the left and right in FIG.

  FIG. 11 is a perspective view of the operating rod 182, which has two plate portions 182 a, and is arranged so that the two plate portions 182 a sandwich the movable shaft 131. Reference numeral 183 denotes a return spring C which urges the operating rod 182 to the right side in FIG. 8 and comes into contact with the stopper C184 to be stationary. Reference numeral 185 denotes a stopper D, which abuts when the operating rod 182 moves to the left in FIG. Other structures are the same as those in the first embodiment.

  Next, manual opening operation will be described. The vacuum valve 101 in FIG. 8 is in a closed state. When the operating rod 182 is manually pushed to the left in FIG. 8, the operating rod 182 comes into contact with the inclined surface 181a of the flange 181 and pushes the flange 181 upward in FIG. When the movable iron core 133 is lifted together with the flange 181, and a GAP of a few millimeters is generated at the portion where the lower end of the movable iron core 133 on the magnetic circuit constituted by the movable iron core 133 and the fixed iron core 132 is in contact with the fixed iron core 132, Magnetic force decreases rapidly.

  When the spring force of the open spring 141 and the contact pressure spring mechanism 121 exceeds the holding force due to magnetic force, the movable shaft 131 starts to move in the opening direction by the spring force of the release spring 141 and the contact pressure spring mechanism 121. The flange 181 and the operating rod 182 are separated.

  In this way, the open state is reached. When the manual operating force is released, the operating rod 182 moves to the right in FIG. 8 by the return spring C183 and comes into contact with the stopper C184 to be stationary.

  In this manner, a manual trip mechanism 180 having a simple structure including the flange 181 and the operation rod 182 that can come into contact with the flange 181 can be obtained.

  In addition, after the operation rod 182 is operated during the manual pulling operation, when the movable member including the flange 181 is self-propelled by the opening spring force against the holding force due to the magnetic force, the flange 181 impacts the operation rod 182. It is possible to safely separate from the operation rod 182 without applying a force such as.

  In addition, safety can be ensured by automatically returning the operating rod 182 to a position where it does not come into contact with the flange 181 by the return spring C183 after the pulling operation. Further, by providing the stopper D185, it is possible to protect the return spring C183 and increase the reliability of automatic return to the operation rod 182.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIG. FIG. 9 is a sectional view showing a closed state in an electromagnetic operating device according to Embodiment 3 of the present invention.

  Hereinafter, an embodiment for carrying out the present invention will be described with reference to the drawings. Two bosses 191 are fixed at symmetrical positions on the side surface of the movable shaft 131. Reference numeral 192 denotes an operating rod which can slide left and right in the figure.

  FIG. 12 is a perspective view of the operating rod 192, which has two plate portions 192 a, and is arranged so that the two plate portions 192 a sandwich the movable shaft 131. Reference numeral 193 denotes a return spring D which urges the operating rod 192 to the right side in FIG. 9 and comes into contact with the stopper E194 to be stationary.

  Two plate portions 192a, which are tip portions of the operating rod 192, are inclined surfaces 192b as shown in FIG. Reference numeral 195 denotes a stopper F which abuts when the operating rod 192 moves to the left in FIG. Other structures are the same as those in the first embodiment.

  Next, manual opening operation will be described. The vacuum valve 101 in FIG. 9 is in a closed state. When the operating rod 192 is manually pushed to the left in FIG. 9, the slope 192b of the operating rod 192 contacts the boss 191 and pushes the boss 191 upward in FIG. When the movable iron core 133 is lifted together with the boss 191 and a GAP of a few millimeters is generated at the portion where the lower end of the movable iron core 133 on the magnetic circuit constituted by the movable iron core 133 and the fixed iron core 132 is in contact with the fixed iron core 132, Magnetic force decreases rapidly.

  When the spring force of the open spring 141 and the contact pressure spring mechanism 121 exceeds the holding force due to magnetic force, the movable shaft 131 starts to move in the opening direction by the spring force of the release spring 141 and the contact pressure spring mechanism 121. The boss 191 and the operation rod 192 are separated.

  In this way, the open state is reached. When the manual operating force is released, the operating rod 192 moves to the right in FIG. 9 by the return spring D193 and comes into contact with the stopper E194 and stops.

  In this manner, a manual tripping mechanism 190 having a simple structure including the boss 191 and the operation rod 192 that can come into contact with the boss 191 can be obtained.

  In addition, after operating the operating rod 192 during the manual pulling operation, when the movable member including the boss 191 self-runs by the opening spring force against the holding force due to the magnetic force, the boss 191 impacts the operating rod 192. It is possible to safely separate from the operation rod 192 without applying a force such as.

  In addition, safety can be ensured by automatically returning the operating rod 192 to a position where it does not come into contact with the boss 191 by the return spring D193 after the tripping operation. Further, by providing the stopper F195, the return spring D193 can be protected, and the reliability of automatic return to the operation rod 192 can be enhanced.

  It should be noted that within the scope of the present invention, the embodiments can be freely combined, or the embodiments can be appropriately modified or omitted.

  The present invention is suitable for realizing an electromagnetic operating device having a safe and inexpensive tripping mechanism.

DESCRIPTION OF SYMBOLS 130 Electromagnetic operation apparatus 131 Movable shaft 132 Fixed iron core 133 Movable iron core 134 Permanent magnet 135 Opening coil 136 Closing coil 141 Opening spring 150 Manual tripping mechanism 151 Lever 152 Rotating shaft 156 Flange 160 Input prevention mechanism 161 Lock plate 164 Input prevention pin 170 Tripping prevention pin 180 Manual tripping mechanism 181 Flange 181a Slope 182 Operation rod 190 Manual trip mechanism 191 Boss 192 Operation rod 192b Slope

Claims (9)

  A movable iron core, a movable shaft fixed to the movable iron core in parallel with the movable direction of the movable iron core, a fixed iron core, an open spring biased to the movable iron core in an opening direction, and the movable iron core when closed, and A magnetic circuit is formed with the fixed iron core, and the magnetic force of the permanent magnet is generated by energizing the movable iron core or the permanent magnet fixed to the fixed iron core that generates a magnetic force that maintains a closed state against the spring. An electromagnetic coil comprising: an opening coil that generates a magnetic force in the movable core and the fixed core in a decreasing direction; and a closing coil that generates a magnetic force that biases the movable core in the closing direction when energized. The operating device includes a flange fixed to the movable shaft, a lever provided between the flange and the movable iron core, and a rotary shaft to which the lever is fixed and rotatably mounted. Operation time, by rotating the said lever to the rotary axis, the electromagnetic operating device, characterized in that the contactable to a surface of the movable iron core side of the flange.   The electromagnetic operating device according to claim 1, wherein the lever includes a return spring that biases the lever in a direction opposite to a direction in which the lever is rotated by an opening operation.   The electromagnetic operating device according to claim 2, wherein the lever includes a stopper portion that suppresses a rotation angle of the lever when the lever is rotated by an opening operation.   A movable iron core, a movable shaft fixed to the movable iron core in parallel with the movable direction of the movable iron core, a fixed iron core, an open spring biased to the movable iron core in an opening direction, and the movable iron core when closed, and A magnetic circuit is formed with the fixed iron core, and the magnetic force of the permanent magnet is generated by energizing the movable iron core or the permanent magnet fixed to the fixed iron core that generates a magnetic force that maintains a closed state against the spring. An electromagnetic coil comprising: an opening coil that generates a magnetic force in the movable core and the fixed core in a decreasing direction; and a closing coil that generates a magnetic force that biases the movable core in the closing direction when energized. In the operating device, an electromagnetic wave comprising: a flange fixed to the movable shaft; and a lock plate that can be moved to a position where the flange can contact the surface of the flange on the side of the movable iron core when the pole is closed. Work equipment. An insertion prevention pin capable of moving and holding the lock plate at a position where the lock plate can be brought into contact with the surface on the movable iron core side of the flange and attached to the lock plate, the lock plate being attached to the flange The electromagnetic operating device according to claim 4, further comprising a return spring that urges the movable iron core in a direction of pulling back from a position where the movable core can be contacted. A movable iron core, a movable shaft fixed to the movable iron core in parallel with the movable direction of the movable iron core, a fixed iron core, an open spring biased to the movable iron core in an opening direction, and the movable iron core when closed, and A magnetic circuit is formed with the fixed iron core, and the magnetic force of the permanent magnet is generated by energizing the movable iron core or the permanent magnet fixed to the fixed iron core that generates a magnetic force that maintains a closed state against the spring. An electromagnetic coil comprising: an opening coil that generates a magnetic force in the movable core and the fixed core in a decreasing direction; and a closing coil that generates a magnetic force that biases the movable core in the closing direction when energized. In the operating device, a through screw hole provided in a fixed portion of the upper portion of the movable iron core, and at the time of closing, is screwed into the through screw hole and attached, and the tip thereof is in the opening direction of the movable iron core. On the facing side Electromagnetic operating device for, characterized in that a contact can trip prevention pin.   A movable iron core, a movable shaft fixed to the movable iron core in parallel with the movable direction of the movable iron core, a fixed iron core, an open spring biased to the movable iron core in an opening direction, and the movable iron core when closed, and A magnetic circuit is formed with the fixed iron core, and the magnetic force of the permanent magnet is generated by energizing the movable iron core or the permanent magnet fixed to the fixed iron core that generates a magnetic force that maintains a closed state against the spring. An electromagnetic coil comprising: an opening coil that generates a magnetic force in the movable core and the fixed core in a decreasing direction; and a closing coil that generates a magnetic force that biases the movable core in the closing direction when energized. The operating device includes a flange that is fixed to the movable shaft and has a slope portion on the surface of the movable iron core, and an operation rod that can contact the slope portion of the flange in a closed state. electromagnetic Work equipment.   A movable iron core, a movable shaft fixed to the movable iron core in parallel with the movable direction of the movable iron core, a fixed iron core, an open spring biased to the movable iron core in an opening direction, and the movable iron core when closed, and A magnetic circuit is formed with the fixed iron core, and the magnetic force of the permanent magnet is generated by energizing the movable iron core or the permanent magnet fixed to the fixed iron core that generates a magnetic force that maintains a closed state against the spring. An electromagnetic coil comprising: an opening coil that generates a magnetic force in the movable core and the fixed core in a decreasing direction; and a closing coil that generates a magnetic force that biases the movable core in the closing direction when energized. An electromagnetic operating device, comprising: a boss fixed to the movable shaft; and an operating rod having a slope portion and capable of contacting the slope portion with the boss in a closed state.   The electromagnetic operating device according to claim 7 or 8, wherein the operating rod includes a return spring that biases the operating rod in a direction opposite to a direction in which the operating rod is operated in the opening operation. .

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